Ibn Taimiyah said: "The heart will not find complete happiness except byloving Allah and by striving towards what is dear to Him. It is not possible toachieve this love except by rejecting all things that compete with it. This iswhat the words, 'There is no god but Allah' mean; this is the spirit of the deenof Ibrahim and of that of every other prophet."(Ibn Taimiya, Majmu' al-Fatawa,vol 28, p.32, Riyadh)