Getting baptised and taking communion are two things we are instructed to do in the Bible which are symbolic, but also more than that. God chooses to use our obedience in going through these actions to communicate with us on a profound spiritual level as well. The religious terminology for things like these are "sacraments".

richmondparkchurch.org.uk an evangelical pentecostal church in Boscombe, Bournemouth, Dorset, UK