Some wise old sayings which has relevance in modern times

As it is said “old is gold” we should not underestimate the relevance of wise old sayings in modern times. Some of them are really informational and inspirational like:

“ A friend in need is a friend indeed”
“You reap what you sow”
“Health is wealth”
“After dinner rest a while; after supper walk a mile”
“Eat to live, not live to eat”
“Feed a cold and starve a fever”
“When one is hungry, everything tastes good”
“Be careful about reading health books. You may die of a misprint”

Can you add some more old sayings which has relevance at all times.