There is an inherent discrepancy 'twixt the World in One's Mind and the World that simply Is.
That is, however, no intrinsically bad thing. For, I find, that the world Within needs the world Without, though they inderdepend and thus are not mutually exclusive.
There needs to be a discrepancy for the pressures, as it were, to have any room or excuse to neutralize: to move towards equilibrium; however, it is not linear, nor is it parabolic:
this, I believe, is where Calculus becomes a valid allegory for Life, itself.