Adiyen.
The answer to this question requires fine discrimination across a very thin line.
Emotions of happiness, sadness, anger, anxiety, feelings of separation etc are there in spiritual life too; but it is focussed on Perumal, kainkaryam to Him, and those who are serving Him.
So, just the emotions are not wrong; whether the emotions are founded on spiritual conception or material conception is what matters. For example, when one’s acharyan goes to Thirunaadu for kainkaryam, we will miss him miserably; we will feel bad and naturally the emotions of sadness and crying will come.
Similarly, if someone loses a father or mother (or someone so close) naturally we will miss them and we will cry. It is wrong to think “Oh, I should not be crying” and repress one’s emotion. Even if the emotion is based on a material conception, we should not repress it based on theoretical understanding. While experiencing the emotion, we should consciously try to not let the emotion (happiness or sadness) to block us from our regular kainkaryam. Care should be taken to not let the emotion put us in excitement or dejection (about past) or anxiety (about future). We must stay grounded and do our regular day-to-day kainkaryams.
Suppose one losses one’s job, of course there will be some sadness (for most of us), and part of the sadness is, “I hope this condition should not affect my kainkaryams”.
In Bhagavad Gita Perumal says “sukhe-dhukhe sama krtva”; ‘perceivie sukha and dhukha the same’; He does not say perceive them zero/ non-existent. So, as long as we are in this world, we are bound to face happiness and sadness, ups and downs based on our karma and other factors. As we go through these experiences, we should remember “this too shall pass; all these are temporary. What is permanent is my kainkaryam to my acharyan. So, let me not make this temporary situation overwhelm me.” This is the practical way to perceive sukha and dhukha as equal.
This is what we should practise. Instead, if we try to repress our emotions based on some theoretical understanding, that is not only wrong, that is dangerous too.
adiyen dasan.