Education.

"If you are planning for a year, sow rice; if you are planning for a decade, plant trees; if you are planning for a lifetime, educate people." (Proverb -anonymous)

"I find television very educating. Every time somebody turns on the set, I go into the other room and read a book." (Groucho Marx)

"Education is what survives when what has been learned has been forgotten." (B.F. Skinner)

"Education is the most powerful weapon you can use to change the world." (Nelson Mandela)

"Learn from the mistakes of others. You cannot live long enough to make them all yourself" (Eleanor Roosevelt).

"To be interested in the change of seasons is a happier state of mind than to be hopelessly in love with spring." (George Santayana)

"Never discourage anyone who continually makes progress, no matter how slow." (Plato)