The letter addressed to Timothy is a book attributed to the apostle Paul, in it Paul refers to his disciple Timothy: "May grace, mercy, and peace from God the Father and Jesus, our Lord, be yours" 1 Timothy 1-2
In his letter Paul emphasizes faith (1 Timothy 1:14), brotherly love (1 Timothy 5), good conscience (1 Timothy 1:19) and godliness. Godliness usually is translated as piety. In the letter to Timothy, Paul seems to make a difference between Mercy and Piety or Godliness.
About piety he teaches: "An exercise thyself unto Godliness, for bodily exercise is profitable for a little, but Godliness is profitable for all things, having promise of the life which is now, and of that which is to come" 1 Timothy 4: 7; "I recommend you to do petitions, prayers, supplications and thanksgivings for all men .... so that we may enjoy peace and tranquility, and lead a godly and dignified life"  1 Timothy 2: 1-2; "as is convenient for people who practice godliness " 1 Timothy 2:10.
Usually godliness is understood as Mercy, that is, as compassion, affability, benedicence, kindness. But in the letter to Timothy it can also be understood as devotion, as an inclination towards the religious, and devotion is an aspect of the Fear of God or Serenity.
The teaching tells us that piety contains, more precisely, "hides" or, if you like, it is not immediately evident that it "contains a promise of Life", or to say, of blessings for this life (fruits of the spirit) and for the future (eternal life), in other terms, here appears  in a veleid form the promise of Eternal Life, of seeing the Kingdom of God. The law of the return, you reap what you sow, acts both in the present and in the future, making a double bliss.
In the beatitudes of Jesus there is no specific beatitude for piety, but in the First Letter to Timothy in the text in 4: 7 is in itself a beatitude, that is, a promise.
The Apostle, taking the concept of the first letter, also seems to relate providence with piety (1 Timothy 2: 1), that is, the divine, the perfect favors the merciful and devout.