Waiting for things to come to you. I read once a description of depression being someone that is too focused on the past and anxiety as someone who dwells on the future. I am not sure I agree with this completely although I do like it.
If you have good feelings about the past and think the current moment is worse than that, then I can see why this might be depressing. But what if the past was bad and 'now' is much better?
Similarly, by worrying about what might happen in the future and bringing those negative thoughts forward into the present, it makes sense that this would make a person anxious. But imagining a better, brighter future? I am not sure how this could cause anxiousness?
So then, it surely cannot solely be about the past or the future that cause these afflictions of the mind, but instead be about positivity and negativity.
Negativity can be thinking you are a victim, cannot see a way out, wanting things to be the way they were, not letting go.
Positive thinking is gratitude, not longing for material things, enjoying the journey, visualising a better future.
Being stuck in the past in a negative way is a result of negative thinking, which is a result of negative habits. You can create habits of gratitude, of visualisation, of mindfulness of the present. And these result in positive thinking, which results in thinking of the past as simply what got you to 'here' and thinking of the future as what is going to get you 'there.'
Trust the process and enjoy it along the way.