Pray sincerely with mindfulness when joining a congregation

This hadith is about the importance of congregational prayer and how it is more rewarding than praying alone. It teaches us that when we pray in congregation, we should be mindful of our individual prayers and not neglect them for the sake of joining the congregation. We should also be aware that even if we join a congregation late, our individual prayers are still valid and important to God. Furthermore, this hadith also shows us that God values sincerity in our actions and intentions as He asked the man which was his real prayer; implying that He knows what is truly in our hearts even if it may not be visible to others.