Emotion intensification
Enhancement of current mind state is a component which alters mood, but unlike many recreational substances does not consistently induce positive and euphoric states regardless of a person's current state of mind and mental stability. Instead it works by amplifying and enhancing a person's current state of mind as it is already, causing the effects to be equally capable of going in both a positive and negative direction.
This is often the cause of why people seem to react to hallucinogenic experiences in completely different ways. The unprepared, the insecure and the mentally unstable who undergo a hallucinogenic experience are very likely to become overwhelmed with negative emotions, paranoia and confusion. This is caused by the person's current negative state becoming greatly amplified above normal levels. On the opposite end of the spectrum, however, positive, prepared and mentally stable people who take the same substance at an identical dosage are very likely to find themselves overwhelmed with states of ecstatic bliss and profound mental revelations.
The external release of pent-up or repressed stress through emotional outburst is also commonly triggered by this effect. This release can take both joyful forms like spontaneous dancing and singing or take distraught forms like crying, sobbing and emotional breakdowns. Once over, however, it leaves the tripper feeling as if an enormous weight has been lifted from their chest.
There is a very clear distinction between substance-induced happiness and genuine happiness. This component does not induce any emotion-- it merely deepens and enhances genuine emotions that are already felt separately from the drug.