The ability to be in the present moment is a major component of mental wellness.
Abraham Maslow

Life is a succession of moments. To live each one is to succeed.
Coria Kent

Live neither in the past nor in the future, but let each day’s work absorb your entire energies, and satisfy your widest ambition.
Sir William Osler

Real generosity toward the future lies in giving all to the present.
Albert Camus