Karunai Sabai-Salai Trust.
The Great Sermon by Vallalar. (Thanks to Vallalar.org)
In the false religions,

some occult power (KARMA), Siddhi had been imaginatively promised. If we try perseveringly for ten or eight years for every SIDDHI, it is possible to attain little siddhi. If we put our Goal or Aim for these siddhis, the goal towards the Almighty God, will get deviated away.

If the aim of God realisation goes, at last the great profit or benefit will go in vain. Or, otherwise, if anyone tries for a long time, and attains a little siddhi, the great gain or soul benefit will go away.
So, let no one put the aim to attain the little siddhi but should aim at the Almighty God only. The evidence for the imaginatory description of above said siddhis: the prose writing ‘PERU VINNAPPAM’ (of Vallalar) and THIRU ARUTPAA – ARUL VILAKKA MAALAI poem which begins as “IYAL VEDHA AAHANAMGAL” and also one should realize the important notes and ideas in them. -- VALLALAR. 22-10-1873.