Holiness

I have been reflecting a little on the Advent Sunday lectionary readings for last Sunday and the coming Sunday. There's a lot in there about John the Baptist. He makes the comparison between himself and Jesus - 'I baptise with water, one comes after me who will bapstise you with the Holy Spirit'. I wonder whether John's baptism has to do with turning from something and Jesus' baptism (with the Holy Spirit) has to do with embracing something.
It's not enough just to turn/repent, we also need to embrace.
I think my concept of holiness for too long has been to do with NOT doing certain things - i.e. defined by absence. I wonder whether I/we need to rediscover (cos there's nothing new) a concept of holiness that has to do with DOING things (that are good) rather than NOT doing things that are bad. i.e. defined by presence (of good things).
You can either try to remove the air from a jam jar by sucking it out or by filling it full of water. i know which one is easier.