Jesus has not promised to build your ministry; he has promised to build his church.
I don't think gay marriage is any threat to marriage. I think divorce is a bigger problem to marriage than anything else.
The easiest way to discover the purpose of an invention is to ask the creator of it. The same is true for discovering your life's purpose: Ask God.
A Christian ought to speak kindly even when given the opportunity to retaliate.
Instant obedience will teach you more about God than a lifetime of Bible discussions.
Instead of focusing on that unappeasable person, refocus on Jesus, who accepts you unconditionally.