"Send for yourself men." When we perform a mitzvah, we create angels, and therefore the mitzvah must be performed with pure thought while subduing our base traits before H''shem.
MiPeninei Noam Elimelch
In the days of the Ba'al Shem Tov, Jews neglected service of the heart, including joy and trust, and focused only on the wisdom of the Torah. It was declared and accepted that simple people could not draw near to H'shem nor could they have any spiritual significance, and as a result, many Jews drifted away. But then H'shem took pity and sent the Ba'al Shem Tov to show the value of each Jew, especially those who served H'shem with joy and simplicity, derived from pure meditations
I shall Raise up Wings of Dawn