In fact, the value of an experience or a discovery could perhaps be proved by the power it gives, the power to change these appearances and transform things, circumstances and the world as it appears to us, in accordance with the will that manifests through that experience. It seems to me that the most universal proof of the validity of an individual or collective experience would be its power to make things — these appearances that we call the world — different from what they are. From the subjective point of view, the effect of the experience on an individual consciousness is an undeniable proof; for one who attains bliss, sovereign peace, unchanging delight, the profound knowledge of things, it is more than proved.
Ref: Questions and Answers 1957–1958