"Sacrify material for the initiative!"

I am a more positional player and  most of the times I am not on search for dynamical possibilities.-

But in modern chess the dynamical play and the fight for initiative have become to a very important weapon!.

Here a position in the Catalan opening, where white offers first a pawn  for quick development and sacrifies  later an exchange  for an  unsecure black king in the center and a long-term initiative