We should regard ourselves as being, as we actually are, in an alliance with God.
The plan was God's; we agreed to it and volunteered for mortal life. God placed us; we choose, struggle, err, repent, strive.
God is our loving Father (loving and Father); and we can be aware that He is in control of our ultimate situation; and therefore will never place us in an impossible situation - but always we should feel in alliance with Him and look for the ways which He has provided for our education and growth towards divinity.
(We may place ourselves in an appalling position, it may seem impossible in terms of the choices and actions we have made - but it never is impossible: repentance is always efficacious, no matter how painful.)
Is this merely wishful thinking? Well, it is certainly something well worth wishing for! The true understanding of Life is indeed optimistic, positive, hope-full.
In our alliance with God we cooperate to live in this mortal world while
firstly giving it full value, yet in the fullest possible awareness of
its eternal context.
But, the method is by choices, striving, trial and error, and education by consequences - including suffering, requiring the recognition that it has some-times been self-inflicted. Life requires surviving without succumbing to either hatred or pride, or eroded by despair - but instead fuelled by love and courage underpinned by hope.
Actual life is not easy, and is not meant to be easy - so is this metaphysical model merely a product of wishful thinking?
Would not wishful thinking make life entirely easy, pleasant, comfortable, interesting - with guarantees? None of this is true of Christian theology - so if it was merely wishful thinking, then it makes a poor job of it.
No - this is realism: and the reality is (we realise with joy!) that mortal life is in its essence (not continuously nor necessarily by quantitative measure) optimistic and positive - ourselves and God:
We are in-it together, in alliance.