In a way we need to have images, even to have expectations. What is important for us to realise is in what ways we are using them destructively.
So that if we don’t have these qualities in us, if instead of loving-kindness we have hatred, hatred towards ourselves, hatred towards others, then it is very important to bring about a shift within ourselves by learning to be our best friend, learning to be a friend to others. In this way it is no harm having an image: I want to be a person who is friendly and tries to practise. Or you can still practise without an image but just developing these qualities and allow your behaviour to emerge from that.
So one can really practise at two levels: if you like to have an image, you can have it, but otherwise you can just practise without an image and allow your behaviour to arise from whatever spiritual qualities you have developed. What is important is to see whether that image corresponds to reality. This is what we have to work with. Images create problems sometimes if the images are unrealistic. When you have an image of how things should be and then what happens in reality is another thing, this is how suffering is created.