He that hath knowledge spareth his words: and a man of understanding is of an excellent spirit.  Even a fool, when he holdeth his peace, is counted wise: and he that shutteth his lips is esteemed a man of understanding.

Proverbs 17:27-28

It is a wise individual who knows what to say, when to say it, and to  whom it is said.  The individual who is wise  also knows how long to speak.

Even those who are foolish, ignorant willingly ignorant of God, when he remains silent is counted wise.  Anyone who knows when to speak and when to be silent is a man of understanding.

As a Christian we ought always tell others  of God’s gift to  mankind; that is His Son  Jesus Christ who died on the cross for out sins, was buried, and rose  from the dead.  To call on Him in the time He calls you is the wisest choice you will ever make.