Dear @Gayathri,
Golden Sunrise, Kindly enlighten us, where from did you learn that we can access that our ancestors could be spiritually weak ? This could be a new learning from me too.
I have always opined that there are various "material and spiritual" aspects, relating us and others around us, which we may try to cleanse, amend, enhance and even alter. There are other aspects of the universe which are governed by the divine Himself or energies – positive or negative, but levels above our caliber. The protocol is – "Let’s do our job and let there be a change, amendment or conversion, if the energies wishes so. Trespassing is not allowed and if done there could be repercussion.
For example, Like Nature has generously given us everything to live peacefully. But we, due to our selfish motives and lack of knowledge, fell trees, pollute water and environment, hence as a result, we get droughts, famines, epidemics, floods and natural disasters. Same is the case with higher levels of universal processes, it goes as destined, but because of our inquisitiveness, extreme attachments, extra-concern or over-confidence, we knowingly or unknowingly meddle into the preset pathway, resulting repercussions again. Now, we initiate a reaction, but mostly turn out as incapable to control the aftermath. This is bad and should be avoided.
Please note, as a soul departed is a universal process, which is beyond our control, knowledge of its status (whether it was spiritually weak) could be miles above our capability. Please see it this way. Take a dropper full of water and pour a drop in a bucket full of water. Can you search the drop now?? Likewise, soul departed is a form of energy which merges in a bigger energy. Once merged, it becomes part of it. That is why I inquired in the beginning about the process to know the process to ascertain a particular soul and its level of spirituality.
Soothing a departed soul is possible only by your own "Bhava" (Emotion)….Offer it and they will be more than satisfied. You may give them SO7R, if you wish anyways.