Sartre and Heidegger: What is Your Essence?

"Existence precedes essence."
~John Paul Sartre


"The essence of Dasein lies in its existence."
~Martin Heidegger

Ontology!  Do I exist because I have essence or do I exist because I will have essence?  What if I say, "I am happy."  Is being "happy" the essence of "I am" because "I am" exist or does "I am" as a dasein exist because of the essence of being "happy"?

Or is this a problem of syntax?

♥