Our Islamic moral core values will not change. But, our actions to execute those moral values will change/vary according to the scenarios that we are facing.
But, how do we must know that our actions are pleasing God? Witnessing and feel of inner peace. Allah (سُبْحَانَهُ وَ تَعَالَى) will allow us to witness whether our actions translate in "pleasing Him ((سُبْحَانَهُ وَ تَعَالَى))". He (سُبْحَانَهُ وَ تَعَالَى) will guide and response to anyone who seek the truth with the intention to please Him (سُبْحَانَهُ وَ تَعَالَى). It is just us who fails to see it. Review our daily activities (last 24 hours) and try to witness how Allahbswt has helped, guided or warned us. Surely we will witness the truth or whether we are pleasing Him or not. We also will know when we loss control of ourself. We learn to improve on daily basis and firm up our belief in Him.
The above is a true statement from our Prophet (صلى الله عليه وآله وسلم).