Not by Shakespeare, but from Finding Your Strength in Difficult Times: A Book of Meditations, a 1993 self-help book by David S. Viscott.
Misattributed
Source: http://quoteinvestigator.com/2014/06/16/purpose-gift/
“The meaning of life is to find your gift. The purpose of life is to give it away.”
“Knowing your purpose gives meaning to your life.”
Source: The Purpose Driven Life: What on Earth Am I Here for?
Variant: Remember to look up at the stars and not down at your feet. Never give up work. Work gives you meaning and purpose and life is empty without it. If you are lucky enough to find love, remember it is there and don't throw it away.
“Loneliness, when accepted, becomes a gift that will lead us to find a purpose in life.”
“Passionate hatred can give meaning and purpose to an empty life.”
Section 75
The True Believer (1951), Part Three: United Action and Self-Sacrifice
Context: Passionate hatred can give meaning and purpose to an empty life. Thus people haunted by the purposelessness of their lives try to find a new content not only by dedicating themselves to a holy cause but also by nursing a fanatical grievance. A mass movement offers them unlimited opportunities for both.
“Believing in yourself is the greatest gift you can give to your life.”
From the Aphorisms http://www.prevale.net/aphorisms.html page of the official website of Prevale
Original: (it) Credere in te stesso è il regalo più grande che puoi fare alla tua vita.
Source: Take The Risk (2008), p. 133
Source: The Boy Crisis (2018), pp. 46
Source: The Purpose Driven Life: What on Earth Am I Here for?
