Growth mindset = Fixed Mindset (default) + a deep commitment to the process of learning + a disregard for failure / a love for challenges + a faith in the outcome working out in the end.
We start with a fixed mindset. We then need to cultivate a deep commitment to and appreciation for the process of learning.
That, then, helps us disregard failure/embrace challenges thanks to that deep commitment.
And, underlying all of this is a faith that the juice will be worth the squeeze.