Wow, this is extremely beautiful to see, the mango tree is finally having flowers and its going to bear mangoes soon. I guess, this is a practical reminder for us that , the tree doesnt bear fruits just mmediately after it is planted. Sometimes, things can take 15- 20years to show the results of our hard work and efforts. It is amazing that you didn't give up and after so many years, it is showing you the results :)