“Say, [O Muḥammad], “If your fathers, your sons, your brothers, your wives, your relatives, wealth which you have obtained, commerce wherein you fear decline, and dwellings with which you are pleased are more beloved to you than Allāh and His Messenger and jihād [i.e., striving] in His cause, then wait until Allāh executes His command. And Allāh does not guide the defiantly disobedient people.” (Qur’an 9:24)
I never met the beloved Messenger (saw). I never had the chance to see him smile, or laugh, or enjoy his company. Yet what we hold in our heart for the beloved Prophet Muhammed (saw) is fierce love. This is not just true for us as Muslims, this is true for many faith traditions. This is true for a many who hold their traditions dear to them.
The shaykh of Imam Bukhari, Ibn Ma’in said about someone who critiqued a companion, calling the man ‘a sucker of his mother’s clitoris’. (‘Hadith: Muhammad’s Legacy in the Medieval and Modern World’ page 87)
“Ahmad ibn Sulayman, Sahnun’s companion, said that whoever says that the Prophet was black is killed. The Prophet was not black.” Source: http://www.masud.co.uk/ISLAM/misc/alshifa/pt4ch1sec5.htm
As you can see people can be very passionate about what they believe. Like wise you should be passionate about your own faith.
The difference between the two statements above is that one statement: Is an ideology unwilling to hear an opposing perspective. Where as the other, though it is very zealous is the ideology of someone who will not sit idly by while even so much as the description of someone they love is misconstrued.
You should also be careful and cautious about giving your knowledge and your time to people, places or institutions who simply do not value you.
(Al-Zurqani, Sharh al-Muwatta, i. p. 7) “The knowledge which I have collected in forty years you are gaining in forty days. How little can you understand it?” Perhaps he wanted to say: “How little can you appreciate it.” Once, Al Shabi transmitted a hadith, then said to the student that he was getting it for nothing, otherwise even for less one had to make a journey from Iraq to Madinah.
Source: (Al-Khatib, al-Rihlah, p. 61-62)
“Do not give dogs what is sacred; do not throw your pearls to pigs. If you do, they may trample them under their feet, and turn and tear you to pieces.” (Matthew 7:6)
Understand the difference between those who benefit by you and those who use you.
In the end Allah (swt) will give everyone their just desserts.