In the Holy Qur'an

Allah will not call you to account for thoughtlessness in your oaths, but for the intention in your hearts; and He is Oft-Forgiving, Most Forbearing. (2:225)

In the Traditions

The Prophet said, “Do not insult the world for it is the best mount for the believer, because by means of it he attains good and through it He is saved from evil.”

Imam Ali said, “The Hereafter is secured through the World.”