St. John of Kronstadt's (+1908) following quote is helpful to me because it proves to me that virtue is something that is to be practiced before it becomes something natural for us, just like anything else in our lives. His following quote from his book "My Life in Christ" illustrates this...that we are called to force ourselves to act the opposite way if we are being tempted by evil. This takes much effort on our part and vigilance over ourselves, which is not easy and not just given to us by God.
“Do everything in opposition to that which the enemy suggests to you: he suggests to you to hate those who offend you—you must love them; bless those who curse you, and do not torment those who take away your property, but give it away willingly; when you want to laugh—weep; when you feel despondent—endeavor to be glad; when you feel envious—rejoice at the prosperity of others; when you are inclined to contradiction and disobedience—immediately submit and agree; when impure thoughts occur to you—be zealous of the purity of your heart, represent to yourself the high destiny of the Christian, made godly in Christ Jesus, and remember that our members are—the members of Christ; when you feel proud—humble yourself; when spiteful—be especially kind; when irritable—preserve calmness; when avaricious—be generous; when distracted—immediately close your feelings to all outward things, and mediated on the ‘one thing needful’; when you feel doubt, little faith, unbelief—then especially call firm faith to your help, remind yourself of the examples of faith, or of believers in the Old and New Testaments, as well as the miracles accomplished by faith, and so on. Do thus, and do not succumb to the enemy: for all passions, partialities, and fancies are of his imagination.”I especially like that he says endeavor to be glad when you are feeling despondent. That excellent word choice means that we should not only choose to be glad, but that it will take some toil, it may not be easy and may not even be pleasant.
So this counsel tells us that it's going to take some work to achieve these same virtues of love, joy, obedience, purity, humility, kindness, peace, faith, and more. This counsel is a “recipe” of sorts for us on how to conduct ourselves when faced with things that are hindrances to behaving in a Christian manner.