Avraham Avinu showed us what bitachon really means.Hashem promised him that Yitzchak would be his future — “ki b’Yitzchak yikarei lecha zera,” your offspring will come through Yitzchak.And then Hashem commanded him to bring that very son as a korban. It made no sense.The promise and the command couldn’t coexist — at least not from…