With many things it’s to do with mindset. For example, a person may pray salaah physically according to the Sunnah and this is praiseworthy. However, the main part of the salaah is the state of the heart.
If a person’s mind isn’t right and he isn’t firm outside of salaah, how will it be inside salaah?
A powerful principle to remember:
“As for those who strive hard in Us (Our Cause), We will surely guide them to Our Paths (i.e. Allah’s Religion – Islamic Monotheism). And verily, Allah is with the Muhsinun (good doers).”
So if you genuinely strive hard then Allah will take care of your affairs and as a person from the past said, knowledge cannot be attained through relaxation of the body.