How can one make work and the pursuit of knowledge solely for the sake of Allah the Almighty?

Whoever performs beneficial knowledge with mastery, intending thereby to suffice and aid the Muslims, will be rewarded according to their intention, for the Prophet (peace be upon him) said: "Deeds are but by intentions." And intention transforms permissible acts into acts of obedience. There is no harm in a woman's permissible work, provided it is free from prohibitions and adheres to the Sharia (definition)'s regulations.