This is a great article from Scott Hubbard, editor for Desiring God. As he points out, God wants us to know His will. Because He loves us, He gives us His Word, the Road Map, so we don’t have to grope in darkness. The Bible is the revealed will of God. If we want to live in His will, then we should “Let the Word of Christ dwell in you richly” (Colossians 3:16). 

Perhaps you could consider leaving a set amount to your church that you feel good about, then direct the remaining funds to other ministries that God has placed on your heart.

I am planning my will, and am wondering if it is appropriate to bequeath a portion of my estate to my faithful pastors? My children are not believers so I am leaving little to them (with an explanation), and the bulk of the estate will go to our church and its missions ministries.

I've been thinking lately about how differently I look at God's will now than I did when I came to Christ in high school.