what to write

Isn't it true that some times you feel like writing some thing but than suddenly you hit the mental block which prevents you from writing any thing.You reada lot of article and feel you should write about it but the question arises as to why you want to write ?Do you want others to know about it or do you feel that it is your duty to spread the thinking process?
May be any thing but one thing is sure that we all love writing and expressing ourself at any time in our life.