The practice is making the effort to maintain steadiness.
This practice becomes well-grounded when continued with reverent devotion and without interruption over a long period of time. 1.14
                            
                            
                            
                            Friendliness
                    among 
friends;
Compassion
                    when meeting those in weaker or unhappy circumstances;
Gladness
                    towards others when they are better or more successful;
Equanimity
                    Showing indifference to those who intentionally try to hurt you at an emotional level.
                    
                
                These five restraints:
                        
                        harmlessness, truthfulness, non-stealing, chastity, unselfishness
                        
                        can be practised voluntarily at all times, because they are not limited by rank,
                        place, time or circumstance and constitute the great vow. 2.31
                    
                    
                    
                    
                    
                    
                    
                    
                    
                    
                
                
                
                    
                
                … reducing movements in body and mind, while meditating on the infinite.
With that posture, practise control of inhalation and exhalation.