Luke 21:19
Jesus Christ, when asked by His disciples what were the signs of the end of the age and His return, gave them generalized answers. But, in the midst of the explanation He gave them a very specific instruction, "By your patience possess your souls."
He showed that, more important than knowing exactly when the Kingdom will come, is the wisdom of having godly patience so that you will not be distracted from the truth of God by every wind of doctrine and can endure to the end.
Related Reading:
Tools for Spiritual Growth
Articles on Patience