Character development in an Islamic Way by Mufti Menk
“Indeed Allah conferred a great favour on the believers when He sent among them a Messenger (Muhammad (blessings and peace of Allah be upon him)) from among themselves, reciting unto them His Verses (the Quran), and purifying them (from sins by their following him), and instructing them (in) the Book (the Quran) and Al-Hikmah (the wisdom and the Sunnah of the Prophet (blessings and peace of Allah be upon him) (i.e. his legal ways, statements, acts of worship, etc.)), while before that they had been in manifest error”
[Aal ‘Imraan 3:164].
Assalamu alaikum,
Yes it is true that we should have good character to be true Muslim. This is good article
Jazak Allahu Khair