And David girded his sword upon his armour, and he assayed to go; for he had not proved it. And David said unto Saul, I cannot go with these; for I have not proved them. And David put them off him. (1 Samuel 17:39) I cannot go with these; for I have not proved them. 1/ A proving ground for God's people . 2/ For such a time as this . 3/ Weapons of our warfare appointed by God and proved by his people - Ephesians 6:10-18 This sermon was preached for Bethel Chapel, Guildford.