I'm not young enough to know everything.

J.M. Barrie

You cannot do a kindness too soon because you never know how soon it will be too late.

Ralph Waldo Emerson

No one knows a son better than the father.

Chinese Proverb

Shared joy is a double joy; shared sorrow is half a sorrow.

Swedish Proverb

Only put off until tomorrow what you are willing to die having left undone.

Picasso

Vale más hacer y arrepentirse, que no hacer y arrepentirse.

Nicolás Maquiavelo