This is not me trying to force Christians or Atheists to Worship any God, but below, I am going to make a list of words that come from ancient Greek Gods, that we still use today.
If you have heard of a "Phobia", this is the ancient Greek word for "Fear", and Phobos was the personification of Fear. In the myths he would be afraid of things, and this is where we get Phobia from. If you are afraid of spiders it's "Arachnophobia". I am not saying that Psychologists know they did this, but the name of the God is in the exact place a Greek mind would have put it in modern times. In Psychology, naming people's fears. If your enemy found out you were afraid of spiders in ancient Greece, they would definitely try to draw the spirit "Phobia" to your surface, using spiders.
Hypnos was the personification of sleep, and in the Myths different things would happen to him to make him fall asleep. This idea has been refined in culture, and we now call it "Hypnotism".
The word "Volcano" was not always widely used, and it actually started in Ancient Greece. You have probably heard of "Pompeii" which is a city which was covered in Ash, and it actually gave Archaeologists an amazing look in to a frozen picture of Greek life. But Pompeii was the first time any one used the word "Volcano" because they thought that "Vulcan" was releasing his fury.
The word "Mentor" is similar. Just how "Phobia" was Personified fear, Athena was personified Law, Wisdom, Courage, Art, etc. In one story Athena disguised herself as "Mentor" so she could come to Earth and help people. So now when someone is helping you learn, you may consider them a "Mentor" and not even think of Athena.
The God "Atlas" was thought to hold up the Earth and the other Planets, so he is similar to the idea of Gravity, except he would work on each planet individually, and they were thought to be "Held up" instead of floating freely. Now that Einstein gave us Relativity and Newton gave us Gravity, we can say Atlas is basically an antique for lack of a better term. But, if you buy a book that has a bunch of Maps in it, that book will be called an "Atlas". The Atlantic Ocean and Atlantis are also named after him.
Nike was the personification of Victory. The Greeks love Victory and they would pray to it in hopes that it would come to them. Today this is similar to how Nike (the company) tricked everyone in to thinking their shoes make you faster. It is almost the exact same idea, just no one says you have to pray, but plenty of Athletes are praying for Victory, while wearing Nikes.
The God Ceres is where we get the word "Cereal" from. Her Festival/Holiday was known as Cerealia. She was basically just the personification of Grain and Motherly relationships. Just like today we have commercials with cereal saying "It's got grains", they were very in to eating cereal grains and what it did for them. Ceres had "Helper Gods" which were really just jobs people could have.
Vervactor, "He who ploughs"
Reparator, "He who prepares the earth"
Imporcitor, "He who ploughs with a wide furrow"
Insitor, "He who plants seeds"
Obarator, "He who traces the first ploughing"
Occator, "He who harrows"
Serritor, "He who digs"
Subruncinator, "He who weeds"
Messor, "He who reaps"
Conuector (Convector), "He who carries the grain"
Conditor, "He who stores the grain"
Promitor, "He who distributes the grain"
"By Jove" is not a popular term any more. But "Jove" is actually Jupiter, and the Greek version of Jupiter is Zeus.
Martial Arts and Martial Law are both examples of things that come from the cults of Mars. For example, you have probably heard of the Spartans. They worshiped Ares/Mars, and as part of their worship they were well trained in Martial Arts. Martial Law is when the President or Military takes complete control of the Government. This is still possible within American law, but Martial law can only be declared if we are having a war at home or something like that.
The God "Chronos" was considered to be the Greek God of Time, and the words Chronology, Chronicle & Chronic come from his name.
On Valentine's day, people think of "Cupid" shooting arrows. The Greek word for Cupid was "Eros" who was the God of Love. This is where we get the word "Erotic" from.
And last but not least, people think that Education is just something that comes natural and we have always known how to focus on History, or Math, or Music, or even Comedy. But these were not always refined arts with deep histories. Originally, they were Gods. The Goddess Mnemosyne is where we get the word "Mnemonics". If you have ever said "My Very Easy Method Just Speeds Up Naming Planets" to remember "Mercury, Venus, Earth, Mars, Jupiter, Saturn, Neptune, Pluto" then you are using Mnemonics. Mnemosyne's children/helper Gods were basically just classes you can take. They were known as "The Muses".
Calliope (Epic Poetry)
Clio (History)
Euterpe (Music)
Erato (Lyric Poetry)
Melpomene (Tragedy)
Polyhymnia (Hymns)
Terpsichore (Dance)
Thalia (Comedy)
Urania (Astronomy)
And the word "Music" comes from the idea of "Muses", which are inspirational spirit things that spark inside us, according to Greek myth.