The common definition of Taqwā is to abstain from the disobedience of Allāh ta'ālā be it minor or major. In the initial stages this will seem difficult. However, if one strives and compels his nafs to stay away from the disobedience of Allāh ta'ālā, then Allāh ta'ālā will honour him with true taqwā by enlightening his heart with the nūr (light) of Taqwā. Once this happens, one will no longer have to struggle to avoid sins as before; rather the heart will develop a disliking for them.
His condition will become like that of a person who has to walk through a path with filth all around. He will be repulsed at the very thought and will try his utmost to avoid that route. However, if he is compelled then he will be very careful as not to let the filth dirty him or his clothes. If by chance some filth does dirty his clothing, he will not be able to rest in peace until it is washed off. Similar is the case of that person whose heart is enlightened with the nūr (light) of Taqwā. He will have an aversion to sins, and if he was to slip and commit a sin, he will not be able to rest in peace until he makes tawbah (repentance) and cleans his heart from the filth of sinning.
There is no better time to adorn ones heart with true Taqwā then the month of Ramadhān. The one who values Ramadhān and spends his time wisely will become a muttaqī.