Islam is a religion the followers of which are under obligation to constantly invite non-Muslims to its acceptance. The manner of such invitation is also set out clearly in the Holy Quran. It is said: Call unto the way of thy Lord with wisdom and goodly exhortation, and contend with them on the basis of that which is best. Thy Lord knows best those who have strayed away from His path, and He knows best those who are rightly guided (16:126). Indeed guidance is bestowed by God and the business of a believer is only to present Islam to non-Muslims wisely and with kindly reasoning. It is for God Almighty to bring about a change of heart. For instance, it is said: Whomsoever Allah wills to guide, He opens his mind to the acceptance of Islam (6:126) ; and it is said: Surely, thou canst not guide whomsoever thou pleasest; but Allah guides whomsoever He pleases, and He knows well those who would be guided (28:57).