BRUTUS: There is a tide in the affairs of men,
Which, taken at the flood, leads on to fortune;
Omitted, all the voyage of their life
Is bound in shallows and in miseries.
On such a full sea are we now afloat;
And we must take the current when it serves,
Or lose our ventures.

William Shakespeare (1564-1616) English dramatist and poet
Julius Caesar, 4.3.218 (1599)