The distinction between the past, present and future is only a stubbornly persistent illusion. - Albert Einstein
Was Einstein speaking as a physicist or as a spiritualist, when he said this? I suspect he was speaking as a physicist. Is it not the physics pioneered by Einstein that tells us that all points in time exist simultaneously? Yet, perhaps, as was often the case, there was a touch of the spiritual in Einstein's pronouncement.
Do not dwell in the past, do not dream of the future, concentrate the mind on the present moment. - Buddha
Eckhart Tolle expands on Buddha's thought by reminding us that the present moment is all there is. There is no past, only memories. There is no future, only speculation. They are both, as Einstein said, a stubbornly persistent illusion.
As they so often do, science and spirituality once again show us two sides of the same coin.