Preaching is the pastor's main work, and preaching is heart work, not just mental work.
Where the Bible is esteemed as the inspired and inerrant Word of God, preaching can flourish. But where the Bible is treated merely as a record of valuable religious insight, preaching dies.
Do not be more devoted to your own brain than you are to the Bible.
Reading is more important to me than eating.
Love is the overflow of joy in God that meets the needs of others.
Pastors and missionaries (need) to know God and to find in him a Treasure more satisfying than any other person or thing or relationship or experience or accomplishment in the world.