You can value yourself only according to the extent that your heart worries about others: your group, our global society, and the whole world too. You may not attain it all at once, but in stages, yet eventually it should all become the most important thing for you.
At first you will see that the group is the most important thing for you, and then our whole global society and finally the whole world. But then everything will turn the other way around: the world will become the most important thing and the global society, the group, and yourself will only be the means for conveying the Upper Light to the whole world.
So you can value your advancement according to how important you consider everyone else and worry that everyone should know and discover the Creator. It turns out that a prayer is the indication of where a person is.
From the Preparation for the Daily Kabbalah Lesson 7/16/13