What has worked fine till now or truth?

The basic flaw about sticking to "What has worked fine till now" is that sooner or later it is going to fail, if it is not aligned with the truth. If it has worked perfectly till now , it is guaranteed that it will fail miserably sometime soon. The sooner a man realises this, the easier it is. The more he disregards the truth, and the further he moves from it, the more disastrous the consequences.

The worst disasters have been due to man disregarding the truth.