In the following passage some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives.

Blessed is the man or woman into whose life has come the beauty and power of such a _____. Prize it well. Do all in your _____ to keep such a friendship unbroken. Avoid the _____, for when it comes it cannot be _____and the jarring note mars the harmony. It is not alone a question of _____that may be full and complete. It is the hurt in the heart that will not readily heal and the confidence that will not fully come back.