Use 'even now' to express that something continues unexpectedly over time.

Surprising Persistence

'Even now' suggests an action or feeling goes against what one might assume about the present.

Contrary to Assumptions

Use 'even now' when highlighting emotions that still exist at the current time.

'Even then' is used to highlight an achievement or action in spite of past difficulties.

Use 'even then' to show that a certain action was taken despite the unlikely past circumstances.

'Even then' reveals that something continued or still held true at that past time, surprisingly.