As I read the following expression, my personal interpretation is as follows:

Everything in life is possible; it's just a question of Strategy and Discipline.

In the expression, number 1 to 3 represent 'strategy' and number 4 to 5 represent 'discipline'.

Having a "strategy' means you know where you are now, where and why you want to go "there", and how best - and what resources you need - to get "there".

That's to say, you have the requisite toolkits to formulate, evaluate and tweak your progress on the forward trajectory.

Having the 'discipline' means you know how to stay on course by putting in the sweat equity of following up and following through what you have set out to do in your game plan, with intense effort and focused execution.