Is it sufficient for entering Paradise to perform the obligatory duties and acts of worship and to seclude oneself from people as much as possible, while disapproving of evil in one's heart, or is striving to empower and support Islam an obligation for entering Paradise?

Performing religious duties and avoiding prohibitions are a means to enter Paradise, as indicated by many Prophetic traditions, among them that whoever prays the obligatory prayers, fasts Ramadan, considers lawful what is lawful, and considers unlawful what is unlawful, will enter Paradise. However, committing forbidden acts may prevent entry into Paradise, such as disobeying parents, severing ties of kinship, and arrogance. As for supporting Islam and inviting others to it, it is obligatory upon every Muslim according to their ability, and disapproving of evil in the heart is not sufficient unless one is unable to change it with the hand or tongue. Isolation may be better in some cases, but the general principle is that mixing with people is better.