In The Name of Allaah, The Most Merciful The Bestower of Mercy.

Imaam as-Saa’di [rahimahullaah] said:

Ponder upon the stories of some of the distinguished people of [piety] and the good life they lived! Whether they were either rich or poor, [facing] hardship or [in a state of] ease, you still found them to be the most well behaved amongst the people- the most relaxed at heart and the most delighted; rather you will find one amongst them in a state of insignificance and poverty, whilst he is pleased, contented, neither displeased with Allaah nor the creation. This is a blessing from Allaah which He bestows on whomsoever He pleases, and He is the Possessor of all blessings.

As for those enslaved by the worldly life-those who have submitted to its glitter- they do not care how they gather wealth, whether through permissible or impermissible means. They are not bothered about [uttering] false and evil speech against the righteous slaves of Allaah, [whilst being] heedless – seeking to raise themselves, disseminating their falsehood and rumours for the sake of their merchandises and to fulfil their lowly desires. However, your Lord knows about them, and He is Ever Watchful over them.

[Source: An Excerpt from Al-Mu’een Alaa Tahseel Aadaab al-Ilm Wa-Akhlaaq Al-Muta’allimeen: page:69-70 by.  slightly paraphrased]