Righteous, Good and pious people are few

Those who have said “Our Lord is Allāh” are many, but..

Allāh (ﷻ) said:

إن الذين قالوا ربنا الله ثم استقاموا

❛Indeed, those who have said, "Our Lord is Allāh" and then remained on a right course..❜ [Fussilat, 30]

Ibn Rajab al-Hanbalī (رحمه الله) has commented on the verse:

الذين قالوا ربنا الله كثير ، ولكن أهل الاستقامة قليل

❛Those who have said "Our Lord is Allāh" are many; yet the people of righteousness (i.e. those who remained on the right course) are few.❜

[Majmū’ Rasāil, 1/339]