An-Nu‘maan ibn Basheer said, I heard the Messenger of Allah
say,

“That which is lawful is clear and that which is prohibited is clear but between them are doubtful matters about which not many people know. So, he who avoids the doubtful matters clears himself in regard to his religion and his honor. But he who falls into doubtful matters falls into that which is prohibited, like the shepherd who pastures around a sanctuary, all but grazing therein. Surely, every king has a sanctuary, and surely Allah’s sanctuary on the earth is His prohibitions. Verily, in the body there is a lump of flesh which, if it is in good repair, all the body will be in good condition; and which, if it is corrupt, the whole body will be
corrupted. Truly, it is the heart.” (Agreed Upon)4

Commentary:

Muslims have been surrounded by doubtful matters in the guise of modern technology and the Twenty-first century lifestyle. People have developed the ability to make that which is unreal seem real and that which is real appear to be unreal. So-called “Democratic”, secular political concepts empower human beings to set rules of law based on their opinions, while ignoring the already ordained divine laws.

Islamic lifestyle and its Divinely based limits will never change. They were set by the Revelation and the Prophetic directives. The great challenge is to stay within these limits and remain relevant to the actual circumstances that we live in. The essence of our differences lie within ourselves. The never-ending dispute about the beginning of fasting in Ramadaan and the establishment of the first day of the following month of Shawwal is a perfect example. The real difference is not astronomical horizons or schools of Jurisprudence.
The difference is in the hearts, Ikhtilaaf-ul-Quloob. May Almighty Allah enable us to purify the essence before we dispute the external.
4 See Al Lu’Lu wal Marjaan fimaa-Tafaqah Alayhi As Shaykhaan (printed by Darul Jeel) Vol.2 pgs 153 &154
Hadeeth # 1028