The gift of the Word of Knowledge is a supernatural gift of the Holy Spirit that is given for the benefit of others. We must be willing to walk in obedience and take risks in order to grow in the gifts. The word of knowledge is used in conjunction with healing and gives faith to the person giving the word and the person receiving the word. God wants the person heal or delivered that why he gave the word of knowledge. God wants us to co-labor with Him. Cooperate with Holy Spirit, take the risk and see what God will do. He will actually manifest what he has actually already done!
Recommended to read: Words of Knowledge by Randy Clark/Message Series, Global Awakening See also YouTube video by Randy Clark on "Words of Knowledge" YouTube Video