I guess we shouldn't really have 'favourite' chapters any more than we should have favourite children.  However, if you were only allowed one chapter of the Bible - this would be one of the top choices.

Listen to these encouraging words:

ALL THINGS WORK TOGETHER FOR OUR GOOD
"We know that all things work together for good for those who love God, for those who are called according to his purpose."

THE HOLY SPIRIT HELPS OUR PRAYERS
"In the same way, the Spirit also helps our weaknesses, for we don’t know how to pray as we ought. But the Spirit himself makes intercession for us with groanings which can’t be uttered. He who searches the hearts knows what is on the Spirit’s mind, because he makes intercession for the saints according to God."

GOD IS FOR US
"If God is for us, who can be against us? He who didn’t spare his own Son, but delivered him up for us all, how would he not also with him freely give us all things?"

MORE THAN CONQUERERS
"No, in all these things, we are more than conquerors through him who loved us. For I am persuaded that neither death, nor life, nor angels, nor principalities, nor things present, nor things to come, nor powers, nor height, nor depth, nor any other created thing will be able to separate us from God’s love which is in Christ Jesus our Lord."

And there is oh such more in this glorious and triumphant chapter...