Only by God's grace can one get a nice wife just as he desires. Similarly, it is only by God's grace that a girl gets a husband suitable to her heart. Thus it is said that if we pray to the Supreme Lord in every transaction of our material existence, everything will be done very nicely and just suitable to our heart's desire. In other words, in all circumstances we must take shelter of the Supreme Personality of Godhead and depend completely on His decision. Man proposes, God disposes. The fulfillment of desires, therefore, should be entrusted to the Supreme Personality of Godhead; that is the nicest solution.
(From Srila Prabhupada's purport to SB 3.21.28)