"There is a tide in the affairs of men, which taken at the flood, leads on to fortune." That is the first line from Shakespeare's "Julius Caesar". For the rest of quote, see: https://www.brainyquote.com/quotes/william_shakespeare_395459
"Don't stop three feet from gold". The above advice is based on a true story about R.U. Darby who quit too soon. The story applies to any goal a person has set: https://medium.com/live-your-life-on-purpose/dont-stop-three-feet-from-gold-5ffc4bd1b71c
“I sent my soul through the Invisible, some letter of that after-life to spell, and by and by my Soul returned to me, and answered: I myself am heaven and hell”—— Omar Khayyam
With doubt and dismay you are smitten You think there’s no chance for you, son? Why, the best books haven’t been written The best race hasn’t been run. —— Berton Braley
Do not go gentle into that good night, Old age should burn and rave at close of day; Rage, rage against the dying of the light. --- Dylan Thomas
“The Moving Finger writes; and, having writ, Moves on: nor all your Piety nor Wit Shall lure it back to cancel half a Line, Nor all your Tears wash out a Word of it." --- Omar Khayyam
“To the whole world you might be just one person, but to one person you might just be the whole world.” ― Pablo Casals