To answer this question, one must essentially delve deeper into the concept of Avatar in Hinduism. One must also try to understand the concept of Advaita in Hinduism. One must be able to grasp the grandest statement of Hinduism that everyone has the potential to attain Godliness. You may say, all these are essentially beliefs and say, “I can’t believe unless ‘scientifically proved’ ” , we will come to some amount of proving a bit later.
According to Hinduism, God takes up human form and comes to live among us to teach us the right dharma and show the way for spiritual advancement for earnest seekers from time to time. They also annihilate evil forces that tend to tilt the balance towards adharma and restore dharma — It is the Avatar.
Avatars, though by looks and physical behaviour will be like a human beings, they are NOT just ordinary mortals. So, fundamentally, Satya Saibaba and Mata Amritanandamayi are NOT just ordinary people. They are avatars.
The way they lead their lives, the way they demonstrate super-human capabilities right from childhood, the way they influence people who are truly attracted towards them through faith and surrender, the way they make miraculous changes in the lives of people (either overtly or covertly), the way they accomplish unbelievable tasks within unbelievable time-frame, the way they spread love and care on humanity cutting across all caste, creed and religious barriers, the way they create a massive revival of spirituality — are all beyond the comprehension of ordinary mortals.
Those who are skeptical,who think they are very rational, think they know all about human beings and God, think they are “scientifically oriented” , who declare themselves proudly as non-believers by closing their ears, eyes, nose, mind and heart and declare “No — these Godmen and Godwomen are all only frauds bent upon cheating and looting people” can only be deluding themselves from reality.
Now coming to the proof.
Thousands of personal experiences can be given by people who experienced changes in their lives by coming to Amma or Satya Sai. You will say “these are concocted stories spread by blind believers in vested interest”.
Just set aside some 20 minutes of your time by keeping your eyes and heart open and go through the following link that contains the historical record of what Mata Amritanandamayi has done in each and every year of her living in this world amidst us in the past 64 years:
Some of the happenings are deeply spiritual about which I am sure you will not be inclined to even learn/digest. But there are also things done to the world. There are records and proofs. Then come to your own conclusion:
How are the grandest tasks accomplished?
They are accomplished by believers’ dedication and hard work; through the money people donate willingly; through the fees collected from institutions; through selling of products and services that the believing devotees (consisting doctors, scientists, teachers, professors, doctorates, engineers, pharmacists, writers, publishers, technicians, artisans, labourers and so on) contribute with love and dedication. A considerable percentage of the services are voluntary.
After all, people who do all these works (as instruments of the avatar) are human beings with their own limitations, deficiencies and inefficiencies too. So, along the side of grand things happening, you will also find some shortfalls, some imperfections, some little blunders and some wastages here and there. But if you look at the macro picture, the negatives will not too big. It is also a part of the divine maya. Nothing is 100% perfect in creation.