Assurance Not Based On How It Makes Me Feel?

Here the Doctor is explaining how we get assurance of our salvation. How when the winds of plague come in trials to try and erode our faith away, what keeps our anchor held, or fights the rust of sin? The assurance of what Christ forensically accomplished on the cross for all who confess His name:

“…if you want to have assurance of salvation, the place to start is not with your feelings, but with your understanding; then feelings follow. The way to get assurance is not to try and feel something, but it is to grasp this objective truth. Look at yourself in Adam; though you had done nothing you were declared a sinner. Look at yourself in Christ; and see that, though you have done nothing, you are declared to be righteous. That is the parallel. We must get rid of all thoughts of our actions there is no boasting. We do nothing; all we are and have results from the obedience of the One – our Lord.” –Martyn Lloyd-Jones preaching on Romans 5:18,19, taken from: Romans 5: Assurance, p274.