Most humans are never fully present in the now, because unconsciously they believe that the next moment must be more important than this one. But then you miss your whole life, which is never not now.
By Eckhart Tolle
He who receives an idea from me, receives instruction himself without lessening mine; as he who lights his taper at mine, receives light without darkening me.
By Letter from Thomas Jefferson to Isaac McPherson: August 13, 1813