When a wave's crest meets another wave's crest, it becomes like this :
The amplitude is higher, the impact is greater and the damage caused is, of course a disaster.
When a wave's crest meets another wave's trough, it becomes like this :
The amplitude is zero, there will be no impact and without doubt, the damage caused (if there is) is at minimum.
Now, to experiment and to apply the concept of the interference of the wave into our life, substitute :
Initial Condition of the Wave --> Our Egos.
Final Condition of the Wave --> The consequences of our Egoistic attitude to us.
May this become a tazkeerah for me and you and us. Have a nice day and God bless.