Besides Islam, is there pilgrimage in other religions? How do adherents of various faiths witness it? What does their books say about it?
What duties do we, creatures, owe to God? What are the requirements of being Muslim? What sense do they have to man? What are their benefits?
The people of the pre-Islamic era of ignorance added some pagan rites to Hajj such as circumambulating the Ka`bah naked believing that this would bring them close to Allah. Islam came and removed all these deviated customs and rites.
Why do we humans need prayer, fasting, such ritual acts? Can’t I be a devoted believer without such acts particularly when I am pious and God-conscious enough? Are there faith-based or action-based religions?