Islam is to testify that there is no god but Allah and Muhammad is the Messenger of Allah, to establish the prayers, to pay the zakat, to fast in Ramadan, and to make the pilgrimage to the House if you are able to do so. Iman is to believe in Allah, His angels, His books, His messengers, the Last Day, and to believe in the divine decree, both the good and the evil thereof. Ihsan is to worship Allah as though you are seeing Him, and while you see Him not, truly He sees you.