I do believe you think what now you speak;
But what we do determine oft we break.
Purpose is but the slave to memory,
Of violent birth, but poor validity;
Which now, like fruit unripe, sticks on the tree;
But fall, unshaken, when they mellow be.
Most necessary ‘tis that we forget
To pay ourselves what to ourselves is debt:
What to ourselves in passion we propose,
The passion ending, doth the purpose lose.
The violence of either grief or joy
Their own enactures with themselves destroy:
Where joy most revels, grief doth most lament;
Grief joys, joy grieves, on slender accident.
This world is not for aye, nor ’tis not strange
That even our loves should with our fortunes change;
For ’tis a question left us yet to prove,
Whether love lead fortune, or else fortune love.
The great man down, you mark his favourite flies;
The poor advanced makes friends of enemies.
And hitherto doth love on fortune tend;
For who not needs shall never lack a friend,
And who in want a hollow friend doth try,
Directly seasons him his enemy.
But, orderly to end where I begun,
Our wills and fates do so contrary run
That our devices still are overthrown;
Our thoughts are ours, their ends none of our own:
So think thou wilt no second husband wed;
But die thy thoughts when thy first lord is dead.
– Hamlet 3.2.182-209