“Consecration” generally has a more mystical sense but this is not absolute. A total consecration signifies a total giving of one’s self; hence it is the equivalent of the word “surrender”…   …You feel a flame in the word “consecration”, a flame even greater than in the word “offering”. To consecrate oneself is “to give oneself to an action”; hence, in the yogic sense, it is to give oneself to some divine work with the idea of accomplishing the divine work.

Ref: Questions and Answers 1950 – 1951