Warning Against Riya' and Minor Shirk

Question:
The questioner asks: Does a Muslim remain safe from hypocrisy, given that he frequently engages in dhikr and tasbih, and has a substantial share of secret deeds? What is the criterion for this?

Answer:
A person must make his deeds sincere for Allah the Exalted, and he must fear and guard against major shirk (associating partners with Allah) and minor shirk. The Prophet (peace and blessings be upon him) said to his Companions: minor shirk. When he was asked about it, he said: It is riya' (showing off in worship). A man stands to pray and beautifies his prayer because he sees a man looking at him.
Shirk, in both its major and minor forms, is very serious. However, major shirk invalidates all deeds and causes its perpetrator to remain in the Fire eternally. As for minor shirk, it does not take one out of the religion, nor does it invalidate all deeds; rather, it invalidates only the deed in which it occurred, and it does not cause its perpetrator to remain in the Fire eternally. Yes.