or rigid thoughts looking Health, Stress-free/less, Which is Important, and What is written in 1 Thessalonian 5:21 for spirit, which affects body and life.

                "hold fast to what is good;"
                      (from 1 Thessalonian 5:21)

For the pliancy of body:
what is needed for preventing or restoring from being / having been rigid of part(s) of body, to keep body properly being pliable ?
Exercising (; strength), stretching, comfortable bed, taking proper amount of water or juice or other liquid, keeping proper body temperature in various ways, well circulation of blood and lymph / body fluid, taking proper health supplements, massage, sauna, ultrasound therapy (on specific area) ?

Constructive thinking is also essential for the pliancy.

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"In everything do to others as you would have them  do to you; for this is the law and the prophets.
"Enter through the narrow gate; for the gate is wide  and the road is easy that leads to destruction, and  there are many who take it. For the gate is narrow  and the road is hard that leads to life, and there  are few who find it.
"Beware of false prophets, who come to you in  sheep's clothing but inwardly are ravenous wolves.  You will know them by their fruits. Are grapes  gathered from thorns, or figs from thistles? In the  same way, every good tree bears good fruit, but  the bad tree bears bad fruit. A good tree cannot  bear bad fruit, nor can a bad tree bear good fruit.  Every tree that does not bear good fruit is cut  down and thrown into the fire. Thus you will know  them by their fruits.
"Not everyone who says to me, 'Lord, Lord,' will  enter the kingdom of heaven, but only the one  who does the will of my Father in heaven.
                                                        (Matthew 7:12-21)

"Come to me, all you that are weary and are  carrying heavy burdens, and I will give you rest.  Take my yoke upon you, and learn from me; for I  am gentle and humble in heart, and you will find  rest for your souls. For my yoke is easy, and my  burden is light."                         (Matthew 11:28-30)