For instance, what saves you is not a solid doctrine regarding how you were saved, but the actual work of Christ on the cross, from which any solid doctrine of salvation arises. The Reformers termed that frigida opinio , cold opinion, with which a person may agree with to the last detail but not have it touch them inside. It doesn't put them into action, fire up their passion, or change their attitude toward life. It is very much a dead letter. Truth is not just something said or communicated or taught.
Truth can also be in the doing, flowing out from a specific event in time and space.
Truth can be discovered in what happens, and can be supported by other things that happen. Through that 'happening' and those actions the truth of Christ was spread. This is one of the ways the Spirit relates life in Christ to our own lives. Theology cannot be drawn purely from experience. It's one step removed from that, even at its closest.