“Everything is possible: everything.”

Source: The Zahir (2005), p. 167.

Omne possibile exigit existere.
De veritatibus primis (1686)

Variant: Because you are alive, everything is possible.
Source: Going Home: Jesus and Buddha as Brothers

Source: The Tales of Alvin Maker, Seventh Son (1987), Chapter 10.

Siddhartha (1922)
Context: Listen my friend! I am a sinner and you are a sinner, but someday the sinner will be Brahma again, will someday attain Nirvana, will someday become a Buddha. Now this "someday" is illusion; it is only a comparison. The sinner is not on his way to a Buddha-like state; he is not evolving, although our thinking cannot conceive things otherwise. No, the potential Buddha already exists in the sinner; his future is already there. The potential hidden Buddha must be recognized in him, in you, in everybody. The world, Govinda, is not imperfect or slowly evolving along a path to perfection. No, it is perfect at every moment; every sin already carries grace within it, all small children are potential old men, all sucklings have death within them, all dying people — eternal life. It is not possible for one person to see how far another is on the way; the Buddha exits in robber and the dice player; the robber exists in the Brahmin. During deep meditation it is possible to dispel time, to see simultaneously all the past, present, and future, and then everything is good, everything is perfect, everything is Brahman.

Variant: Everything should be made as simple as possible, but no simpler.